- Welcome to Python.org
- Pycharm
- The Python Language Reference — Python 3.9.6 documentation
- The Python Standard Library — Python 3.9.6 documentation
- math — Mathematical functions — Python 3.9.6 documentation
- NumPy Documentation
- openpyxl – A Python library to read/write Excel 2010 xlsx/xlsm files — openpyxl 3.0.7 documentation
- itertools — Functions creating iterators for efficient looping — Python 3.9.6 documentation